AERIAL TRIANGULATION USING INDEPENDENT PHOTO PAIRS - DISCUSSION

SANDOR VERES HAS PRESENTED AN INFORMATIVE AND INTERESTING REVIEW OF THE THREE DIFFERENT METHODS USED TO DROP CONTROL FROM HIGH FLOWN TO LOW FLOWN MODELS. ALTHOUGH THIS APPROACH CONSIDERABLY REDUCES THE QUANTITY OF GROUND CONTROL NECESSARY FOR MAPPING, THERE SEEMS TO BE LITTLE JUSTIFICATION FOR CLASSIFYING IT AS AEROTRIANGULATION. TO THE BEST OF THE WRITERS KNOWLEDGE, THE TERM AEROTRIANGULATION BY THE METHOD OF INDEPENDENT PAIRS, WHICH WAS USED BY VERES, IS BEING USED IN PHOTOGRAMMETRIC LITERATURE TO DESCRIBE A COMPLETELY DIFFERENT CONCEPT. IN CONTRAST TO THE METHOD OF AEROTRIANGULATION BY CONNECTION OF SUCCESSIVE PHOTOGRAPHS /BETTER KNOWN AS THE FOLGEBILDANSCHLUSS/ WHERE THE SCALE AND THE ORIENTATION IN SPACE ARE TRANSFERRED FROM ONE STEREO-MODEL TO THE SUCCEEDING MODEL IN THE TRIANGULATION INSTRUMENT, THE METHOD OF AEROTRIANGULATION BY INDEPENDENT PAIRS INVOLVES THE FORMATION AND MEASUREMENT OF SUCCESSIVE MODELS EACH HAVING ITS OWN INDIVIDUAL SCALE AND ORIENTATION IN SPACE. THE FORMATION OF THE STRIP BY CONNECTING EACH MODEL TO ITS PREDECESSOR IS NORMALLY DONE BY COMPUTATIONS OUTSIDE THE TRIANGULATION INSTRUMENT. THE BASIC PROBLEM IN THIS APPROACH IS ESSENTIALLY THAT OF TRANSFORMING THE COORDINATES OF POINTS MEASURED WITH RESPECT TO A SYSTEM PECULIAR TO A GIVEN MODEL TO A SYSTEM COMMON TO THE ENTIRE STRIP. A VARIETY OF METHODS IS USED TO SOLVE THIS PROBLEM. THUS, IT MIGHT BE INADVISABLE TO USE THE TERM AEROTRIANGULATION WITH INDEPENDENT PAIRS IN CONNECTION WITH THE METHODS EVALUATED BY VERES. THE POPULAR TERM DROPPING CONTROL FROM HIGH FLOWN TO LOW FLOWN MODELS SEEMS TO ADEQUATELY DESCRIBE THIS CONCEPT.

  • Supplemental Notes:
    • Vol 92, No SU 2, PP 65-66
  • Authors:
    • Karara, H M
  • Publication Date: 1966

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00202602
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 12 1994 12:00AM